forked from TrueCloudLab/restic
148 lines
4.1 KiB
Go
148 lines
4.1 KiB
Go
// Copyright 2018, Google
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package b2
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import (
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"context"
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"errors"
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"io"
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"time"
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)
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// Key is a B2 application key. A Key grants limited access on a global or
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// per-bucket basis.
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type Key struct {
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c *Client
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k beKeyInterface
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}
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// Capabilities returns the list of capabilites granted by this application
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// key.
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func (k *Key) Capabilities() []string { return k.k.caps() }
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// Name returns the user-supplied name of this application key. Key names are
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// useless.
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func (k *Key) Name() string { return k.k.name() }
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// Expires returns the expiration date of this application key.
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func (k *Key) Expires() time.Time { return k.k.expires() }
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// Delete removes the key from B2.
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func (k *Key) Delete(ctx context.Context) error { return k.k.del(ctx) }
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// Secret returns the value that should be passed into NewClient(). It is only
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// available on newly created keys; it is not available from ListKey
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// operations.
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func (k *Key) Secret() string { return k.k.secret() }
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type keyOptions struct {
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caps []string
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prefix string
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lifetime time.Duration
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}
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// KeyOption specifies desired properties for application keys.
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type KeyOption func(*keyOptions)
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// Lifetime requests a key with the given lifetime.
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func Lifetime(d time.Duration) KeyOption {
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return func(k *keyOptions) {
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k.lifetime = d
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}
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}
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// Deadline requests a key that expires after the given date.
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func Deadline(t time.Time) KeyOption {
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d := t.Sub(time.Now())
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return Lifetime(d)
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}
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// Capability requests a key with the given capability.
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func Capability(cap string) KeyOption {
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return func(k *keyOptions) {
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k.caps = append(k.caps, cap)
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}
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}
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// Prefix limits the requested application key to be valid only for objects
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// that begin with prefix. This can only be used when requesting an
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// application key within a specific bucket.
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func Prefix(prefix string) KeyOption {
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return func(k *keyOptions) {
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k.prefix = prefix
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}
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}
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// CreateKey creates a global application key that is valid for all buckets in
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// this project. The key's secret will only be accessible on the object
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// returned from this call.
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func (c *Client) CreateKey(ctx context.Context, name string, opts ...KeyOption) (*Key, error) {
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var ko keyOptions
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for _, o := range opts {
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o(&ko)
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}
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if ko.prefix != "" {
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return nil, errors.New("Prefix is not a valid option for global application keys")
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}
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ki, err := c.backend.createKey(ctx, name, ko.caps, ko.lifetime, "", "")
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if err != nil {
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return nil, err
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}
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return &Key{
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c: c,
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k: ki,
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}, nil
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}
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// ListKeys lists all the keys associated with this project. It takes the
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// maximum number of keys it should return in a call, as well as a cursor
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// (which should be empty for the initial call). It will return up to count
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// keys, as well as the cursor for the next invocation.
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//
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// ListKeys returns io.EOF when there are no more keys, although it may do so
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// concurrently with the final set of keys.
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func (c *Client) ListKeys(ctx context.Context, count int, cursor string) ([]*Key, string, error) {
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ks, next, err := c.backend.listKeys(ctx, count, cursor)
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if err != nil {
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return nil, "", err
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}
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if len(ks) == 0 {
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return nil, "", io.EOF
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}
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var keys []*Key
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for _, k := range ks {
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keys = append(keys, &Key{
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c: c,
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k: k,
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})
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}
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return keys, next, nil
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}
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// CreateKey creates a scoped application key that is valid only for this bucket.
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func (b *Bucket) CreateKey(ctx context.Context, name string, opts ...KeyOption) (*Key, error) {
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var ko keyOptions
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for _, o := range opts {
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o(&ko)
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}
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ki, err := b.r.createKey(ctx, name, ko.caps, ko.lifetime, b.b.id(), ko.prefix)
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if err != nil {
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return nil, err
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}
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return &Key{
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c: b.c,
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k: ki,
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}, nil
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}
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